Stratonice (; fl. possibly late second half of 4th century BC and first half of 3rd century BC) was a Greek noblewoman of very high status and was the wife of the Ptolemaic official Archagathus of Libya.
Stratonice is an unattested person and is only known through surviving evidence. When her husband was an Epistates in Libya serving in Cyrenaica, Stratonice and her husband Archagathus on marble piece made a dedication of a temenos to Isis and Serapis at Alexandria on behalf of Archagathus’ maternal uncle, the Ptolemaic prince Ptolemy II Philadelphus and his maternal grandmother the first Ptolemaic Queen Berenice I of Egypt. The record is dated from ca. 283 BC-278 BC and is on display in the Greco-Roman Museum of Alexandria. The inscription below translated in Greek and English reads:
ὑπὲρ βασιλέως Πτολεμαίου
τοῦ Πτολεμαίου καὶ Βερενίκης
Σωτήρων Άρχάγαθος Άγαθοκλέους
ὁ ἐπιστάτης τῆς Λιβύης
καὶ ἡ γυνὴ Στρατονίκη
Σαράπιδι Ἴσιδι τὸ τέμενος.
King Ptolemy
son of Ptolemy and Berenice
the Saviours Archagathus son of Agathocles
epistates of Libya
and his wife Stratonice
Serapis, Isis of temenos.